高炉铸铁冷却壁结构优化

采用正交试验和数值模拟方法对高炉炉身下部冷却壁主要结构参数进行优化,对优化前后的冷却壁温度场进行计算。结果表明,冷却壁热面最高温度的影响因素中影响程度从大到小依次为:水管直径、水管间距、水管中心线距冷却壁热面距离、壁体厚度,其中水管直径、水管间距和水管中心线距冷却壁热面距离为显著因素;最优冷却壁结构参数组合为:水管直径60mm、水管间距180mm、水管中心线距冷却壁热面距离120mm、壁体厚度220mm,优化后的冷却壁较优化前的冷却壁冷却性能有较大幅度的改善。     

润滑油基材碳酸二异辛酯合成工艺研究

以碳酸钾作为催化剂,异辛醇与碳酸甲辛酯催化酯交换-吸附法合成碳酸二异辛酯。考察了醇酯比、催化剂用量和反应时间等因素对反应的影响。通过实验得到适宜工艺条件为催化剂用量为5 %,醇酯比为4:1,温度控制在160~170 ℃条件下反应时间为2 h,产品碳酸二异辛酯产率为47.2 %,采用气相色谱分析质量纯度99.1 %。催化剂重复使用4次时,催化活性没有明显的降低。     

基于投影散斑的结构表面形貌测量

结构形貌测量具有重要的工程应用价值。设计了基于投影散斑的结构表面形貌测量方案,结合双目立体视觉标定、散斑特征匹配、三维重建等关键技术,搭建了测量系统,并用该系统测量了典型结构表面的形貌点云数据,最后将测得的点云数据与结构的CAD(computer aided design)模型进行配准,评估了测量方法误差,验证了该方法的准确性。结果表明,投影散班形貌测量方法可以实现结构表面形貌的高精度测量,其最大误差为0.2 mm。     

基片温度对直流电弧等离子体喷射沉积金刚石膜的影响

研究直流电弧等离子体喷射比化学气相沉积金刚石系统中，基片温度对金刚石膜生长速率和质量的影响。实验发现，金刚石膜的生长速率和结晶性随基片温度的增加而境调增加。     

木素降解菌Phanerochaete chrysosprium营养条件对麦草木素降解选择性指数的影响

利用正交回归试验设计方法研究Phanerochaete　chrysosprium选择性降解麦草原料木素的营养条件，初步探讨了影响因素交互作用对白腐菌选择性指数的影响，提出优化条件。实验发现菌处理麦草原料洗脱液的A205吸收值与降解后木素失重线性相关(R＝0．9776)，可为白腐菌处理纤维原料效果的快速评估提供依据和方法。     

The stress response factor RpoS is required for the natural transformation of Escherichia coli

The natural transformation of Escherichia coli is a novel and recently developed system that has significance for genetic studies and the biological safety of genetic engineering. However, the mechanisms of transformation, including development of competence and DNA uptake, are not thoroughly understood. In this study, we demonstrated the effect of the general stress response regulator RpoS, which has been associated with E. coli transformation, on natural transformation performed in an “open system”. We find that RpoS is required for natural transformation but not to artificial transformation and RpoS mainly affect transformation in the liquid culture prior to plating. In the liquid culture, RpoS over-expression promotes natural transformation in early exponential phase and static incubation accumulates RpoS and promotes transformation to a limited extent. These findings provide detailed understanding of RpoS function on natural transformation.     

论情报信息为企业服务的内容及发展趋势

21世纪知识经济时代，情报信息已成为企业发展的重要资源。高校情报信息部门面对这一极大的信息咨询市场，必须积极有效地开展服务，勇于探索新形势下信息服务的新途径，最终把科技信息转化为生产力。     

某办公楼工程地下室上浮事故实例分析及处理

文章通过某办公楼地下室上浮事故处理实例，综合考虑各种因素，分析了其产生的原因，通过技术和经济分析，提出了解决地下室抗浮及结构加固处理方案，可为今后类似问题的分析和处理提供参考。     

Microelectronics-embedded channel bridging and signal regeneration of injured spinal cords

Due to the difficulty in spinal cord regeneration with biological methods, the microelectronic neural bridge, a new concept based on microelectronic technology, is presented. The microelectronic system has been realized in the forms of hybrid and integrated circuits. The integrated circuits for neural signal detection, stimulation, and regeneration are realized in a CMOS process. In animal experiments with 100 toads, 48 rats, and 3 rabbits, nerve signals have been successfully detected from spinal cords and sciatic nerves, and functional electrical stimulation has been carried out for spinal cords and sciatic nerves. When the microelectronic system is bridged between the controlling and stimulated nerve, the relevant motion of legs and nerve signal waveforms, which are stimulated by the evoked or spontaneous nerve signal through such a system, have been observed. Therefore, the feasibility of the presented method was demonstrated.     

鄱阳湖生态经济区动漫文化创意产业发展路径研究

由于生产力信息化的变革,对文化与动漫文化产品形成的设计思维、设计方法、设计样式、传播途径与方式等提出严峻的挑战。本文就江西动漫文化产业的开发,对动漫作品、产品设计、媒介之间的产业链进行了研究与分析。